05 2017 档案

摘要：SELECT student.sno,sname,cnameFROM student,sc,courseWHERE sc.sno=student.sno AND sc.cno=(SELECT cno FROM course WHERE cname='数据库')AND ... 阅读全文

posted @ 2017-05-08 17:15 练涛阅读(89) 评论(0) 推荐(0) 编辑